robinson



iinrrno srii'rns 'Partnr crimen.

w. w. ROBINSON, or RIPoN, wisconsin.

PUMP.

Specification of Letters Patent No. 32,485, dated June 4, 1861.

To all whom it may concern:

Be it known that l, TV. TV. ROBINSON, of Ripon, in the county of Fond duLac and State of Viisconsin, have invented a new and useful Improvementfor Operating the Piston-Rod of a Pump; and I do hereby declare that thefollowing is a full, clear, and exactdescription thereof, referencebeing had to the accompanying' drawings, making a part of thisspecification, in which- Figure l is a sectional view through a doubleacting pump having a hollow piston showing the application of my devicefor operating the pump. Fig. 2 is a transverse section through Fig. l inthe vertical plane indicated by red line a', x.

Similar letters of reference indicate corresponding parts in bothfigures.

This invention relates to a novel device for operating a double actingforce pump having a hollow discharging piston.

It consists in screwing to the hollow piston in a suitable manner arack-the teeth of which engage with a sector rack which latter is keyedto a rock-shaft and receives an alternate rocking motion from acrankshaft through the medium of a pitman and a vibrating arm, as willbe hereinafter described, so that a rotary motion given to the crankshaft will communicate a uniform alternate vertical motion to the hollowpiston.

To enable those skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

In the accompanying drawings, A, represents a boXwhich is shown merelyas a support for the pump and mechanism for operating it.

B, is the pump cylinder, and C, is a chamher formed on one side of thiscylinder. The cylinder B,with its chamber C, are secured down to thebottom of the box A, and carefully packed so that they will not leak attheir lower ends. The top of cylinder B, and the chamber C, have headswhich close them tightly at their upper ends and through the head ofcylinder B, passes the vertical hollow piston tube D, which is curvedover at its upper end as shown in Fig. 2, forming a nozzle a, from whichwater is discharged into spout E. The nozzle portion of hollow pistontube D, passes through a stationary bracket E', and the vertical portionnear the curve passes through a collar b, which is secured to the top ofbox A. This keeps the piston tube in a proper position and prevents itfrom ro-` 4tating in its up and down movement. The

lower end of piston tube D, is iared out forming a bell mouth c, and tothis lower end of the piston tube a solid valve d, is attached by shortrods c, e, c. This valve d, is in a parallel plane with the lower edgeof the bell mouth c, and the rods c, c, c, pass freely through a centralopening through a piston G, which is packed tightly within the cylinderB, and is moved up and down by the piston tube D. The space between thetop surface of valve (l, and the bottom edge of the bell mouthed portionc, is greater than the thickness of the piston Gr, consequently therewill be allowed a slight play to the piston tube, and while the pistontube is ascending the valve nl, will draw up the piston and close theopening which is through this piston thus causing an upward suctionthrough the pipe g, which communicates with the cylinder below thepiston Gr. The suction pipe g, is provided with a valve 71, openingupward.

Vhen the piston tube D, descends the valve d, will be pushed downwardand the lower edge of the tube D, will be forced tightly down on pistonGr, so that the water which is below this piston and over valve 7L, willrush up through the piston and through eduction pipe, or piston tube D.hen the piston G, descends it sucks water into the side chamber C,through valve opening z', the `valve of which opensy upward and aschamber C, communicates with the cylinder B, through the opening 7c,above the piston, water will be drawn through valve opening z', chamberC, and opening 1c, into cylinder B, when the piston Gr, descends, thenagain when the piston ascends, this water above it will be forced upthrough piston tube D. The pump is therefore double acting and acontinuous discharge of water is obtained from nozzle a, during theoperation of the A ings. K, is an arm of a suitable length, secured toand projecting down from rockshaft J. To the lower end of this arm K, apitman rod L, is connected, which is carried of and again connected tothe end of crank arm M, which latter is keyed to the end of crank-shaft-N. Now by rotating this shaft N, using for this purpose a common winch,the shaft J will receive a rocking motion, and the sector J, will give avertical reciprocating movement to the piston tube through which thewater is discharged.

The operation of the entire machine is as follows: Rotary motion isgiven to the shaft N, which communicates a vertical reciprocating motionto the piston tube D, through arm M, pitman L, arm K, sector J, and rackH, as before described. Vhen the piston tube D, which is the eductionpipe also, is drawn up the valve el, closes the opening through pistonG, and water is drawn through valve opening g. Then when the piston tubeis forced down the valve d, is depressed and the end of piston tube isforced down tightly over the opening through piston G, and the water isforced up through the piston tube. In this descent of the piston G, avacuum is produced above it and water rushes in through valve openingz', through chamber C, and fillsy up the space above the piston, andthis water is forced up through tube D, when the piston is again drawnup. Thus the suction and the forcing action of the pump occurssimultaneously both in the ascent and descent of thepiston Gr, and acontinuous discharge of water from nozzle a, is effected.

I do not claim the arrangement of valves, nor the hollow piston rod, nordo I claim the rack and sector gearing when these parts are consideredseparately and` irrespective of the combination herein described butWhat I do claim as new and desire to secure by Letters Patent; is,

The combination with the hollow piston rod D, and the pump otherwiseconstructed as described, of the rack H, sector J, rockshaft J pitman L,crank M, and crankshaft N, all arranged as, and for the purposes hereinset forth.

W. IV. ROBINSON.

Witnesses:

H. H. MEADE, S. B. Mon.

